Projection board

ABSTRACT

A projection board provides an acrylic transparent base material with a flat facial side thereof uniformly adhered with a metal grain layer made of aluminum powder to show an image projected from a projector brightly by means of refection of the metal grain layer. Further, another flat facial side of the transparent base material is uniformly adhered with a frosted layer, which has light penetration rate between 40 to 95% and thickness between 1 to 4 micrometers for obtaining much better effect of image display.

BACKGROUND OF THE INVENTION

1. Field of the Invention:

The present invention is related to a projection board and particularlyto a projection board, which is capable of showing a projected imagebrightly with beautiful color like a crystal.

2. Brief Description of the Related Art:

Due to projector being developed, the work such as teaching or briefingcan be carried out much fast and easily. Progress of technology makes acolor projector possible to connect with a desk top computer or a laptop computer for digital image data saved in the computer being sent tothe projector and projected to a projection board.

Recently, quality of the digital image related to color of image andpixel is improved greatly with aid of unceasing reach and development ofelectronic technology. Hence, how to obtain an image on the projectionboard vividly is a subject worth the suppliers and manufacturers of theprojector and the projection board to care.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to provide aprojection board which is capable of displaying an image projected bythe projector vividly.

Another object of the present invention is to provide a projection boardwhich is capable of showing the image brightly with beautiful colors.

In order to achieve the preceding objects, the projection boardaccording to the present invention includes a transparent base materialbeing a flat plate with a first flat facial side and a second flatfacial side opposite to each other and a metal grain layer beinguniformly adhered onto the first flat facial side to reflect and showthe image.

In a preferred embodiment of the present invention provides atransparent base material made of glass, plastics, film or acrylics forbeing adhered with a metal grain layer to enhance visual effect likecrystal of the projection board.

In another preferred embodiment of the present invention provides ametal grain layer made of silver powder or aluminum powder to reflectand show the image projected by the projector, wherein adhesive such asresin is employed to adhere the metal grain layer onto the first flatfacial side of transparent base material or a plastic film is employedto be attached with the metal grain layer and adhered onto the firstflat facial side.

In a further preferred embodiment of the present invention provides afrosted layer uniformly adhered to the second flat facial side of thetransparent base material and the frosted layer has 40 to 95% lightpenetration rate and 1 to 4 micrometers thickness.

In a further preferred embodiment of the present invention provides aplastic film as the transparent base material and a yarn net made ofnylon or polyester is adhered onto the frosted layer to enhance effectof projection and reinforce strength of the projection board.

In a further preferred embodiment of the present invention provides aplastic film as the transparent base material and a yarn net made ofnylon or polyester and another plastic film are adhered onto the metalgrain layer sequentially to reinforce strength of the projection board.

In a further preferred embodiment of the present invention provides aplastic film as the transparent base material and another plastic filmand a yarn net made of nylon or polyester are adhered onto the metalgrain layer sequentially to reinforce strength of the projection board.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and theeffectiveness of the present invention can be more fully understood withreference to the following description and accompanying drawings, inwhich:

FIG. 1 is a perspective view of a transparent base plate for aprojection board according to the present invention;

FIG. 2 is a perspective view of the first embodiment of a projectionboard according to the present invention;

FIG. 3 is a perspective view of the second embodiment of a projectionboard according to the present invention;

FIG. 4 is a perspective view of the third embodiment of a projectionboard according to the present invention;

FIG. 5 is a sectional view of the fourth embodiment of a projectionboard according to the present invention;

FIG. 6 is a sectional view of the fifth embodiment of a projection boardaccording to the present invention; and

FIG. 7 is a sectional view of the six embodiment of a projection boardaccording to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1 to 4, the first to third embodiment of a projectionboard according to the present invention are illustrated. The projectionboards 10, 20, 30 are provided to allow a projector (not shown)performing projections. That is, images can be projected to theprojection boards 10, 20, 30 clearly and brightly with beautiful colorsby the projector even if the indoor lighting is not turned off.

The respective projection board 10, 20, 30 basically provides a flatplate shaped transparent base material 11, which is made of such asglass, plastics, film or acrylic. To intensify visual effect of theprojection board is the purpose of using the transparent base material11 such that the projection board looks like crystal once the projectoris in operation.

It can be seen in FIGS. 1 to 4, the transparent base material 11 is flatplate shape with a first facial side 111 and a second facial side 112opposite to each other. The first facial side 111 is uniformly adheredwith a metal grain layer 12, in which the metal grains are prepared in aform of such as silver powder or aluminum powder (not shown in FIG. 4).It is preferable that the metal grain layer 12 is arranged with 100%light shielding rate to reflect the image projected by the projectorsuch that the projection board 10, 20, 30 is capable of showing theimage clearly and brightly.

The method for the metal grain layer 12 being adhered to the basematerial 11 shown in FIG. 2 is to mix the metal grains such as silverpowder or aluminum powder with adhesive such as resin first and then theadhesive mixture is sprayed or printed over the transparent material 11directly or over the plastic film before transferring to the transparentbase material 11. As for the method for the metal grain layer 12 beingadhered to the base material 11 shown in FIG. 3 is to spray or print theadhesive mixture onto a plastic film 13 made of such as polycarbonate,PVC or PET and then adhere the plastic membrane 13 onto the transparentbase material 11 directly or with back glue.

In order to enhance durability of the projection board 10, 20, 30,anti-friction powder can be added in the mixture of the adhesive and themetal grains to increase hardness of the metal grain layer 12 over 1 Hso as to provide a property of being anti-scratch and wearable.

The second flat facial side 112 of the transparent base material 11shown in FIG. 4 is uniformly adhered a frosted layer 31 in addition tothe metal grain layer 12 at the first flat facial side 111, which is thesame as the metal grain layer 12 shown in FIGS. 1 and 2. The frostedlayer 31 is a thin layer of glass powder, mica powder, quartz powder orwax glued to the second flat facial side 112 directly or a plasticmembrane with the frosted layer glued to the second flat facial side112. The frosted layer 31 has a light penetration rate between 40 to 95%and has a thickness between 1 to 4 micrometers. It is preferable thatthe thickness of frosted layer is 2 micrometer.

Hence, the image can be projected to the second flat facial side 112 ofthe transparent material 11 of the projection board 30 shown in FIG. 4in addition to being projected to the first flat facial side 111. Thefrosted layer 31 on the second flat facial side is capable of scatteringthe strong concentrative light from the projector to avoid the projectedimage hurting the eyes. It has been performed a test and the test showsthat the image projected onto the second flat facial side 112 providesmuch better effect of image quality than that projected onto the firstflat facial side 111.

Referring to FIG. 5, the fourth embodiment of the projection boardaccording to the present invention is illustrated. Similarly, a plasticfilm 53 made of such as polycarbonate, PVC or PET is arranged as thebase material with one of the facial sides thereof adhered with a metalgrain layer 54 and the other facial side thereof adhered with a frostedlayer 52. Further, a yarn net made of nylon or polyester is adhered ontothe frosted layer 52 to enhance projecting effect of the projectionboard 50 and reinforce strength of the projection board 50.

Referring to FIG. 6, the fifth embodiment of the projection boardaccording to the present invention is illustrated. Similarly, a plasticfilm 62 made of such as polycarbonate, PVC or PET is arranged as thebase material with one of the facial sides thereof adhered with a metalgrain layer 63 and the other facial side thereof adhered with a frostedlayer 61. Further, a yarn net 64 made of nylon or polyester is adheredonto the metal grain layer 63 and another plastic film 65 made ofpolycarbonate, PVC or PET is adhered onto the yarn net 64 to reinforcestrength of the projection board 60.

Referring to FIG. 7, the sixth embodiment of the projection boardaccording to the present invention is illustrated. Similarly, a plasticfilm 72 made of such as polycarbonate, PVC or PET is arranged as thebase material with one of the facial sides thereof adhered with a metalgrain layer 73 and the other facial side thereof adhered with a frostedlayer 71. Further, another plastic film 74 made of polycarbonate, PVC orPET is adhered onto the metal grain layer 73 and a yarn net 75 made ofnylon or polyester is adhered onto the second plastic film 74 toreinforce strength of the projection board 70.

While the invention has been described with referencing to preferredembodiments thereof, it is to be understood that modifications orvariations may be easily made without departing from the spirit of thisinvention, which is defined by the appended claims.

1. A projection board, which is suitable of showing an image projectedby a projector, comprising: a transparent base material being a flatplate with a first flat facial side and a second flat facial sideopposite to each other; and a metal grain layer being uniformly adheredonto the first flat facial side to reflect and show the image.
 2. Theprojection board as defined in claim 1, wherein the transparent base ismade of such as glass, plastics, thin film or acrylic.
 3. The projectionboard as defined in claim 1, wherein the metal grain layer is made ofsilver powder or aluminum powder.
 4. The projection board as defined inclaim 1, wherein the metal grain layer is adhered to the first flatfacial side with adhesive.
 5. The projection board as defined in claim1, wherein the metal grain layer is attached to a first plastic film andthe first plastic film is adhered to the first flat facial side.
 6. Theprojection board as defined in claim 1, further comprises a frostedlayer, which is uniformly adhered to the second flat facial side andprovides a specific light penetration rate.
 7. The projection board asdefined in claim 6, wherein the light penetration rate is between 40 to95%.
 8. The projection board as defined in claim 6, wherein thethickness of frosted layer is between 1 to 4 micrometers.
 9. Theprojection board as defined in claim 6, wherein frosted layer is a thinlayer made of glass powder, mica powder, quartz powder or wax.
 10. Theprojection board as defined in claim 6, further comprises a yarn netadhered onto the frosted layer.
 11. The projection board as defined inclaim 10, wherein the yarn net is made of nylon or polyester fiber. 12.The projection board as defined in claim 6, further comprises: a yarnnet adhered onto the metal grain layer; and a second plastic filmadhered onto the yarn net.
 13. The projection board as defined in claim12, wherein the yarn net is made of nylon or polyester fiber.
 14. Theprojection board as defined in claim 6 further comprises: a secondplastic film adhered onto the metal grain layer; and a yarn net adheredonto the second plastic film.
 15. The projection board as defined inclaim 14, wherein the yarn net is made of nylon or polyester.
 16. Theprojection board as defined in claim 1, wherein the metal grain layerprovides 100% light shielding rate.
 17. The projection board as definedin claim 1, wherein the metal grain layer contains anti-friction powderand provides hardness over 1 H.